Personally, I've never had to cry out of joy. I'm not saying I've never been happy in my life. There were lots of moments where I was so happy I could burst out of my body out of joy. But never have I cried because of it.
I had tear coming from laughter, but that's more of a physical reflex, rather than tears coming from emotions.
In all honesty, the idea to cry out of joy kinda breaks my brain. To me, tears are signs of sadness, or a reflex to clear your eyes ....